Let Kenny do it. I shot Duck because it was his son but he needs to come to terms with what happened, I can't shelter him more than I've already have and I handed him the gun and told him he could do it.

I think, for the sake of his mental health, it'll probably be for the best.

i shot duck, and i shot the boy but this made me feel like it could foreshadow episode 5. Maybe in episode 5, lee gets trapped and its up to kenny to save himself from some zombie kids(maybe they go in a school or something) and kenny either lives or dies depending on if you had him shoot duck or the boy in the attic(or both).